Collapsible ruler



FIG. 1 is a first perspective view of a collapsible ruler showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a second perspective view of the collapsible ruler in its folded state;

FIG. 6 is a top plan view of the collapsible ruler in FIG. 5;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a third perspective view of the bottom side of the collapsible ruler of FIG. 1;

FIG. 10 is a bottom plan view thereof; and,

FIG. 11 is a fourth perspective view of an alternate bottom side of a collapsible ruler showing a new design.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for the collapsible ruler, as shown and described. 